Sighting apparatus of breech-loading guns.



, A. T. DAWSON GL6. T. BUCKHAM. swarms APPARATUS 0F BREECH LOADING (suns.

APPLICATION HLED JAN- 6, 1912.

Patented May16, 1916.

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A. T. DAWSON (TL G. T. BUCKHAM.

SIGHTING APPARATUS 0F BREECH LOADING GUNS.

APPLICATION FILED IAN- 6, I9I2- Patented May 16, 1916.

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UNITED STATES PATENT OFFICE.

ARTHUR TREVOR DAWSON AND GEORGE THOMAS BUCKHAM, OF WESTMINSTER, LONDON, ENGLAND, ASSIGNORS T0 VICKERS LIMITED. OF WESTMINSTER,

NGLAND.

S'IGHTING APPARATUS OF BREECH-LOADING- GUNS.

Application filed January 6, 1912.

To all whom it may concern:

Be it known that we, ARTHUR TREVOR DAWSON, knight, and GEORGE THOMAS BUCK- HAM, both subjects of the King of Great Britain, residing at Vickers House, Broadway, Westminster, in the county of London, England, have invented certain new and useful Improvements in Sighting Apparatus of Breech-Loading Guns, of which the following is a specification.

This invention relates to sighting apparatus of the kind in which the sight is arranged longitudinally with respect to the axis of the gun. According to this invention the said sight is adapted to turn about a transverse axis which is coaxial with the trunnions and passes through or approximately through the axis of the sight at or near the eyepiece end thereof, so that the eyepiece receives practically no movement during the setting of the sight and the elevating of the gun to bring the sight into alinement with the target. The vertical deflection pivot is preferably so arranged that its axis also intersects the aforesaid transverse axis.

In sighting apparatus of the kind in which the sights are rigidly cross connected and are carried by a vertical axis on a sight bracket which extends transversely across the gun cradle the sights are carried by a rigid member which is mounted on a vertical pivot at the center of the said transverse sight bracket, the position of the said pivot being such that its axis intersects or approximately intersects the axis of the gun trunnions, so that the movements of the eyepieces of the sights are reduced to the minimum during deflection. The said member has a carrier at each end in which the telescopic sights are mounted in such a position that the axis of the trunnions passes through the eyepiece of the sights or approximately so.

In the class of sighting apparatus in which the sights are mounted on separate brackets which are cross connected at the rear by means of a rod or the like, the deflection pivots may be so arranged that their axes intersect the aforesaid transverse axis at a point at or near the eyepiece end of the sight.

In order that the said invention may be clearly understood and readily carried into effect, we will describe the same more fully Specification of Letters Patent.

shaft 1).

Patented May 16, 1916.

Serial No. 669,749.

with reference to the accompanying drawings in which z- Figures 1 and 2 are respectively a side elevation and a half plan showing more or less diagrammatically one constructional form of the invention. Fig. 1 is a detail horizontal section on the line ll of Fig. 1. Figs. 3 and 4 and Figs. 5 and 6 are views similar to Figs. 1 and 2 showing other constructional forms of the invention, and Fig. 7 is an end view of Fig. 5. Fig. 8 is a diagrammatic plan showing a sight having its deflection pivot intersecting the axis of the sight and the axis of the trunnions at a point near the eyepiece of the sight.

Like letters of reference indicate similar parts in all the figures.

A represents the bracket or saddle-piece. B the rigid member and C one of the carriers for the telescopic sights D. The said bracket or saddle-piece A is hinged on the pivots a which are preferably formed on the gun trunnions A". As is clearly shown in Figs. 1, 3 and 5 the transverse portion of the bracket A is channel shaped to receive the member B which is pivoted to the center of the bracket by means of the vertical deflection pivot 12 (Figs. 2, 4 and 6) the position of this pivot being such that its axis intersects or approximately intersects the axis of the trunnions as aforesaid.

The sight carriers C (of which only one is shown in the drawings) are rigidly connect- 1 ed to the outer ends of the pivoted member B, and in the examples shown are so arranged that the telescopic sights D can be mounted therein in a position such that the axis of the trunnion passes through their eyepieces as aforesaid.

The deflection gear comprises in each of the examples shown, a longitudinal shaft 6 which is mounted in bearings in the flanges a a of the bracket A in such manner that it can be rotated but cannot move longitudinally. The said shaft carries a worm b which engages either with a worm segment B on the member B as in the examples shown in Figs. 1 and 2, and Figs. 5, 6 and 7, or with a pivoted nut B carried by the said member as shown in Fig. 4.

The shaft b is slidably connected with a shaft 1) by means of a squared end b (Fig. 2) engaging in a corresponding hole in the The shaft 6 is in turn connected with the deflection hand wheel B which in ion elevating device and the extension A are '3."In sightingapparatus "combination with the sight disposed longitudinally with respect to the gun, of means for pivoting said sight so that its horizontal replaced by a worm wheel quadrant A carried at one side of the bracket A. The said quadrant is concentric with the pivots a of the bracket A and has gearing therewith a worm a mounted on a longitudinal shaft A which is carried in a bracket A (Fig. 7) on the cradle. The said shaft is suitably connected with the sight elevating hand wheel which is preferably arranged on the left hand side of the gun.

What we claim and desire to secure by Letters Patent of the United States is:

1. In sighting apparatus for ordnance, the combination with the longitudinally dis posed sight pivoted for movements about vertical and horizontal axes, of means for pivoting said sight so that its horizontal axis'of I movement passes approximately through the axis of the sight at the eye piece end thereof and/means foli pivoting the first named f means so that the vertical axis of movement of the sight passes approximately through the said horizontal axis.

2. In sighting apparatus for ordnance, the

combination with the gun trunnions and the sight pivoted for movement about a horizontal axis and disposed longitudinally with respect to the gun, of means for pivoting said sight so that'its horizontal axis of movemerit passes approximately through the axis of'the sight at the eye piece end thereof and is approximately in line with the axisof the trunnions.

for ordnance, the

Copies 'oithis patent may be ottainedz'for five centseach, .byaddressingthe ,com nissioneriolt iratents,

axis of movement passes approximately 4. In sighting apparatus for ordnance, the

combination with the sight disposed longitudinally with respect to the gun of a bracket, a pivot for said bracket arranged approximately co-axially with the gun trunnions, a carrier in which the sight is mounted sothat the axis of the trunnions passes approximately through the axis of the sight atthe eye piece end thereof, and means for pivoting said carrier to the bracket.

5. In sighting apparatus for ordnance, the combination with the sight disposed longitudinally with respect to the gun, of I a bracket, a pivot for said bracket arranged approximately co-axially with the un trunnions, a carrier in which the sight is mounted so that the axis of the trunnions passes approximately through the axes of the sights at the eye piece ends thereof, and a vertical pivot for connecting said carrier tothe bracket, the axis of this pivot approximately intersecting the axis of the pivot ofsaid bracket.

'6. In sighting apparatus for ordnance, the n her carrying said'sights so that the axis of the trunnions passes approximately through I the axes of the sights at the eye piece ends thereof, a transverse bracket, and a pivotal connection between said member and bracket the axis of which connection passes approximately through the axis of the midway between the sights.

gun trunnions In testimony whereof we aflix oursigna- 'tures in presence of two witnesses.

ARTHUR TREVOR DAWSON. GEORGE THOMAS BUQKHAM. "Witnessesz JNo. RL'CASWELL, I ERNEST LARKINS. 

